Round 4 Findings
The sample
The children were sampled in geographic clusters, which were selected through a semi-purposive approach. Within each cluster, children were randomly selected.
The sample size of the Younger Cohort (2,000 children) was considered an appropriate number given the duration and scope of the study. It was also considered to be sufficiently large for statistical analysis in general, allowing for the detection of moderate-sized differences between sub-groups of children. The Older Cohort sample was selected for comparison and to help us with developing questionnaires and survey instruments.
The attrition rate to date has been low compared to other longitudinal studies: 2.6% for the Younger Cohort and 4.3% for the Older Cohort between Round 1 and Round 4.
Further details on the Young Lives Survey Design and Sampling in India are available here.
Round 4 Findings
The fourth round of Young Lives household and child data was collected between July 2013 and February 2014. The Younger Cohort children were aged between 11 and 12 years old and the Older Cohort were aged between 18 and 19 years old. The key findings summeries are: